Which letter-cluster will replace the question mark (?) to complete the given series?

AVTE CTRG ERPI GPNK   ?

Which letter-cluster will replace the question mark (?) to complete the given series?

HFK, KHM, ?, QLQ, TNS

Which letter-cluster will replace the question mark (?) to complete the given series?

QML, PRC, OWT, NBK, ?

Which letter-cluster will replace the question mark (?) to complete the given series?

CABQ, CEJC, CIRO, CMZA, ?

Select the option that represents the letters that, when placed from left to right in the following blanks, will complete the letter series.
_ V J R W B _ _ R W B V L _ _ B V _ _ W

Which letter-cluster will replace the question mark (?) to complete the given series?

TQT, ZSB, FUJ, LWR, ?

Which letter-cluster will replace the question mark (?) to complete the given series?

FHG, IKJ, LNM, ?

Which letter-cluster will replace the question mark (?) to complete the given series?

RMTS, WGAK, BAHC, GUOU, ?